Prop root

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This topic is discussed in the following articles:

angiosperms

Adventitious roots, when modified for aerial support, are called
prop roots, as in corn or some figs (
Ficus; Moraceae). In many tropical rain forest trees, large woody
prop roots develop from adventitious roots on horizontal branches and provide additional anchorage and support. Many bulbous plants have contractile adventitious roots that pull the bulb deeper into the ground as it grows....

mangroves

...some centimetres above the low-tide level. They have small openings (lenticels) in their bark so that air can reach the rest of the plant’s root system. Another feature of most mangroves is aerial
prop roots, which form a tangled jungle, even after the main roots and stem bases of the trees have decayed. In the Onagraceae family, a similar adaptation to an oxygen-deficient environment is seen...

trees

Mangroves are not the only trees that spread by dropping
prop roots from their branches. The habit is well developed in several tropical figs (
Ficus), including one popular in small sizes as a houseplant—the rubber plant (
F. elastica). Most noteworthy of the group is the banyan tree (
F. benghalensis) of India; its numerous
prop roots develop into secondary trunks that...

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